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1. (WO2018205440) MINIATURE SOUND GENERATOR

Pub. No.:    WO/2018/205440    International Application No.:    PCT/CN2017/096851
Publication Date: Fri Nov 16 00:59:59 CET 2018 International Filing Date: Fri Aug 11 01:59:59 CEST 2017
IPC: H04R 9/06
Applicants: GOERTEK INC.
歌尔股份有限公司
Inventors: GUO, Xiang
郭翔
LIU, Huawei
刘华伟
Title: MINIATURE SOUND GENERATOR
Abstract:
The present invention relates to the technical field of electroacoustic products, and provides a miniature sound generator, comprising a shell (10), and a vibration system and a magnetic circuit system which are received in the shell (10); the magnetic circuit system comprises a plate-like magnet yoke (20); a central magnet (24) and a central magnetic conductive plate (26) are sequentially provided at the center of the magnet yoke (20); a side magnet (22) and a side magnetic conductive plate (28) are sequentially provided at the edge portion of the magnet yoke (20); the magnet yoke (20) is fixed at the lower portion of the shell (10); the corner of the magnet yoke (20) is provided with a positioning gap (202) formed by two straight edges perpendicular to each other; the lower end of the shell (10) is provided with a positioning rim (120) matching the positioning gasp (202) and also formed by two straight edges perpendicular to each other; transition gaps (204) recessed inward are provided at a position where the two straight edges of the positioning gap (202) are connected; a right angle formed by the two straight edges of the positioning rim (120) is inserted in the transition gap (204); there are at least two transition gaps (204) diagonally provided. The miniature sound generator has good concentricity, high acoustic performance, good stability, and long service life.